| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
|
| Presentation Title |
Laser Powder-bed Fusion of Ternary Al-Ce-X Alloys with Slow-diffusing Transition Metals (Mn, Cr, V, Mo, W) |
| Author(s) |
Clement Ekaputra, Jovid U. Rakhmonov, Christian Leinenbach, David C. Dunand |
| On-Site Speaker (Planned) |
Clement Ekaputra |
| Abstract Scope |
We study the microstructure and mechanical properties of ternary Al-2Ce-1X (at.%) alloys fabricated by laser powder-bed fusion additive manufacturing, where X = Mn, Cr, V, Mo, or W are slow-diffusing transition metals. These alloys contain a high volume fraction of coarsening-resistant, submicron precipitates: (1) ~8 vol.% of interconnected, eutectic Al11Ce3, and (2) ~10 vol. % of equiaxed, primary Al20CeX2 precipitates. The ternary Al20CeX2 phases are isomorphous among these various alloys. All alloys show higher hardness in the as-fabricated and aged (400°C) conditions than the base Al-Ce alloy due to these additional ternary precipitates. Hardness decreases with aging time at 400°C for all alloys, with the Al-Ce-Cr alloy showing the highest hardness after three months. This study focuses on characterization of microstructure in the as-fabricated and aged conditions, and elevated-temperature mechanical properties including hardness and creep, of the ternary Al-Ce-X alloys. |